[Effect of gamma-aminobutyric acid, taurine and catecholamines on the synaptic processes in Lorenzini's ampules in Black Sea skates].

Perfusion of the basal membrane of the ampullae of Lorenzini with GABA, taurine or catecholamines produced a reversible decrease in resting and evoked activity in afferent nerve fibers. Picrotoxine, phentolamine and propranolol did not suppress the electrical activity. Our findings exclude GABA, taurine and catecholamines as the transmitters at the ampullary electro-receptorsensory nerve synapses.